/*
 * File:	Blob.h
 *
 * Copyright (c) Freescale Semiconductor, Inc. All rights reserved.
 * See included license file for license details.
 */
#if !defined(_Blob_h_)
#define _Blob_h_

#include "stdafx.h"

/*!
 * \brief Manages a binary object of arbitrary length.
 *
 * The data block is allocated with malloc() instead of the new
 * operator so that we can use realloc() to resize it.
 */
class Blob
{
public:
    //! \brief Default constructor.
    Blob();

    //! \brief Constructor.
    Blob(const uint8_t *data, unsigned length);

    //! \brief Copy constructor.
    Blob(const Blob &other);

    //! \brief Destructor.
    virtual ~Blob();

    //! \name Operations
    //@{
    //! \brief Replaces the blob's data.
    void setData(const uint8_t *data, unsigned length);

    //! \brief Change the size of the blob's data.
    void setLength(unsigned length);

    //! \brief Adds data to the end of the blob.
    void append(const uint8_t *newData, unsigned newDataLength);

    //! \brief Disposes of the data.
    void clear();

    //! \brief Tell the blob that it no longer owns its data.
    void relinquish();
    //@}

    //! \name Accessors
    //@{
    uint8_t *getData() { return m_data; }
    const uint8_t *getData() const { return m_data; }
    unsigned getLength() const { return m_length; }
    //@}

    //! \name Operators
    //@{
    operator uint8_t *() { return m_data; }
    operator const uint8_t *() const { return m_data; }
    //@}

protected:
    uint8_t *m_data;   //!< The binary data held by this object.
    unsigned m_length; //!< Number of bytes pointed to by #m_data.
};

#endif // _Blob_h_
